142105440 has 96 divisors (see below), whose sum is σ = 457228800. Its totient is φ = 37082624.

The previous prime is 142105433. The next prime is 142105451. The reversal of 142105440 is 44501241.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19411 + ... + 25709.

It is an arithmetic number, because the mean of its divisors is an integer number (4762800).

Almost surely, 2^142105440 is an apocalyptic number.

142105440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142105440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228614400).

142105440 is an abundant number, since it is smaller than the sum of its proper divisors (315123360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142105440 is a wasteful number, since it uses less digits than its factorization.

142105440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6364 (or 6356 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 142105440 is about 11920.7986309643. The cubic root of 142105440 is about 521.8394421134.

Adding to 142105440 its reverse (44501241), we get a palindrome (186606681).

The spelling of 142105440 in words is "one hundred forty-two million, one hundred five thousand, four hundred forty".